<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS绘制太极图</title>
  <style>
    .box {
      position: absolute;
      width: 300px;
      height: 300px;
      top: calc(50% - 150px);
      left: calc(50% - 150px);
    }
  </style>
</head>
<body>
  <div class="box">
    <img src="./img/taiji.svg" alt="">
  </div>
</body>
</html>